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51

overnight diapers size 7

Worth a look

Shows searches that convert (12.8% search→purchase), but a deep review moat (18,541 avg reviews) keeps it on the watch list.

Market size 76Growth 20Conversion 96Competition 37Returns 96Price range 47Avg price 94Brand share 21Review moat 17Quality gap 21

Conversion

Incredible12.8%

search→purchase rate — share of searches ending in a sale

Returns

Incredible0.7%

return rate — above 5% kills the launch gate

Avg price

Great$47.35

avg listing price — sweet spot $15–$100

Market size

Great$893K

$893K/yr · 147K searches

Price range

Okay$9.91–$189.21

cheapest to priciest tracked listing — scored on the share inside $15–$100

Competition

Okay63%

top-5 click share — leaders hold, buyers still browse

Brand share

Bad92%

top-5 brand share — brand-locked demand

Quality gap

Bad4.7★

avg incumbent rating — lower means beatable quality

Growth

Bad-9.8%

90-day search growth — must beat 0% to launch

Review moat

Bad18,540.52

avg incumbent reviews — the moat a new listing must climb

According to Flapen's Amazon United States niche tracking, overnight diapers size 7 is a $893K/yr Amazon United States market (147K searches/yr). The top 5 brands hold 92% of demand. Demand peaks in Jan–Feb–Dec. Verdict: Worth a look — 51/100.

Data updated Jul 28, 2026 · scored weekly · How we score niches

overnight diapers size 7 market data

Units sold / yr
15K–20K
avg 500–750/product
Revenue / yr
$710K–$947K
units × avg price
Conversion rate
12.8%
Avg BSR
#68
Page quality
0%
Prime
100%
Sponsored
85%
Out of stock
0.3%
Avg brand age
57 months
Avg seller age
131 days

Competition & brand share

The top 5 products take 63% of clicks — established leaders, but buyers still shop beyond them.

Brands

10 flat

Sellers

50

Top-5 brand share

92%

Top 20: 100%

Top-5 click share

63%

Top 20: 93%

Open market

5%

  • GoodNites40%
  • Ninjamas20%
  • Pull-Ups17%
  • Inspire10%
  • HUGGIES5%
  • Pampers3%
  • Open — no brand owns it (4 brands, 5%)

Demand & seasonality

Weekly Amazon search volume, last 102 weeks — -9.8% search growth over the last 90 days.
6K4KHoliday '24Spike '25Prime Day '25Holiday '25Spike '26DecMarJunAugNovMarMay

Peak months: Jan, Feb, Dec · busiest ÷ quietest = 2.4×

Top overnight diapers size 7 search terms

  • overnight diapers size 754K/yr
  • night diapers size 721K/yr
  • nighttime diapers size 719K/yr
  • size 7 overnight diapers13K/yr
  • overnight diapers size 88K/yr
  • night time diapers size 77K/yr
  • size 8 overnight diapers6K/yr
  • huggies overnight size 87K/yr
  • huggies size 8 overnight diapers3K/yr
  • size 7 diapers overnight3K/yr
All search terms

Top overnight diapers size 7 products on Amazon

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

0%5%$45K10%$89K15%$134K20%$179K101001K10K100K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 24 tracked products in this niche — three views at once, no toggling.

What buyers say about overnight diapers size 7

What buyers praise and complain about, mined from review topics.

What buyers love

Leak-Proof15%

“No leak”

Size-Overall10%

“The fit is snug without being tight”

Quality-Overall9%

“These diapers are great quality”

Absorbency9%

“The absorbency is excellent”

Sleep Quality8%

“Overall, these Pull-Ups are a good option for night-time training, providing reliable protection and comfort”

Value For Money6%

“This is the best deal ever”

Comfort-Overall5%

“comfortable”

Allergies4%

“They haven't caused any rash for my son”

Ease Of Use3%

“Easy to use”

Design-Overall3%

“The design is nice”

What buyers complain about

Leak-Proof23%

“Absolutely not leak free”

Size-Overall13%

“do NOT fit my son the same”

Smell7%

“the whole drawer smelled like it”

Allergies6%

“Rash”

Quality-Overall6%

“Not the best”

Absorbency4%

“Not absorbent”

Functionality-Overall3%

“Didnt work/fit”

Value For Money3%

“Its expensive”

Product Condition2%

“Old box”

Moist/Dry2%

“still waking up dry”

Top return reasons

Size-Overall72%
Leak-Proof7%
Advertised Vs Actual Product5%
Value For Money3%
Absorbency2%
Age Suitability2%
Functionality-Overall2%
Smell2%
Comfort-Overall1%
Quality-Overall1%

Common questions

Is overnight diapers size 7 profitable to sell on Amazon United States?
The niche generates $893K/yr across 27 tracked products. 6 of 7 products launched in the last 360 days are still selling. 90-day search growth is -9.8%. Flapen's verdict: Worth a look (51/100).
How competitive is the overnight diapers size 7 niche?
10 brands and 50 sellers compete. The top 5 products take 63% of clicks and top 5 brands hold 92% of demand.
What do buyers complain about in overnight diapers size 7?
Top complaints mined from reviews: Leak-Proof, Size-Overall, Smell. The return rate is 0.7%.
When does demand for overnight diapers size 7 peak?
Demand peaks in Jan–Feb–Dec; the busiest month runs 2.4× the quietest.
What does it cost to enter the overnight diapers size 7 niche?
Listings span $9.91–$189.21; the average listing price is $47.35 (sweet spot $15–$100). The average incumbent carries 18,541 reviews — the moat a new listing must climb.